The rise of far-right politics across the world may hit already scant foreign aid, increase tensions between communities and countries, and lead to more people fleeing conflict, warn Nobel laureates, leaders and experts.

Populist parties and nationalist politicians across Europe and the United States are gaining popularity amid a migrant crisis and sluggish global economic growth.

Experts say this is not only fueling xenophobia and hate crimes against minorities, it could lead to more violence and more migrants and refugees seeking shelter in the West.